Manufacture of envelops, postal wrappers, and the like.



H. BROWN.

MANUFACTURE OF ENVELOPS, POSTAL WRAPPERS, AND THE LIKE.

APPLICATION FILED FEB. 28, 1916.

1,215,248. Patented Feb.6,1917.

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HENRY BROWN, or WIMIBLEDON, ENGLAND.

MANUFACTURE OF ENVELOPS,'POSTAL WRABPERS,-AND THE LIKE.

Specification of Letters Patent.

Patented Feb. 6, 1917.

Application filed February 28, 1916. Serial No. 81,033. Y

To all whom it may concern:

Be it known that I, HENRY BROWN, a subject of the King of Great Britain, residing at Wimbledon, in the county of Surrey, England, have invented a new and useful Improvement in Apparatus for Use in the Manufacture of Envelope, Postal W'rappers, and the like, of which the following is a specification.

This invention relates to apparatus for use in the manufacture of envelops, postal wrappers and the like of the kind in which the gummed border of the closing flap is provided with apertures, notches or slits,

having edges of reduced thickness as de-- scribed in the specification of my application for Letters Patent of'the United States Serial No. 81,034, filed February 28, 1916.

According to my invention, the apertures, notches or slits in the flap are made by means of-punches which have, around the part that serves for forming the aperture, notch or slit, a conical, convex or other inclined surface, hereinafter referred to as an inclined surface, that is adapted, when the die has a fiat or other suitable coacting surface, to reduce the thickness of the paper adjacent to said aperture, notch or slit, for example by forming a conical or concave depression in the surface of the paper. Between the punch and this conical or like inclined surface, a groove may advantageously be provided into which the paper compressed by the inclined surface of the punch and die can flow. By my invention, the

. edge of the paper can be reduced, if desired,

to a knife-edge around the aperture, notch or slit, so as to enable it to lie smoothly down 011 the body of the envelop or other surface on to which it is gunnned.

Conical, concave or other inclined surfaces, hereinafter referred to as inclined surfaces, are preferably also arranged to extend outside or between and outside the punches for forming the apertures, notches or slits, so as to thin the edge of the whole or part of the gummed border of the flap.

The. said punches with the conical or other inclined surfaces around them may be advantageously combined with the punches or cutters used for cutting from a band or sheet of paper the blank from which the envelop, postal wrapper or the like is to be folded. v

In the accompanying drawings I have shown how my said invention may be conveniently and advantageously carried into practicez- V Figure l is a vertical section of a reciprocating punch and its die, illustrating my invention. v

Fig. 2 is a plan of the die.

Fig. 3 is an enlarged section of an envelop-flap perforated and reduced in thickness by a punch and die such as those shown in Fig. 1. v

Fig. 4 shows a similar arrangement to that in Fig. 1, but adapted to produce slits near the edge of the flap;

Fig. 5 is an underside view of a series of the punches shown in Fig. l.

Fig. 6 shows a portion of an envelop-flap after being shaped by the device in Figs. 4 and 5.

a is a die plate having a flat surface Z).

In the device shown in Figs. 1 and 2, the circular punch 0, which coacts with a dieaperture. (Z in the plate a, has around it a conical surface 6 that coacts with the flat upper surface 6 of the plate a, in order to reduce gradually the thickness of the paper around the edge of the hole f formed by the punch c, as shown at g in Fig. 3. On the outer side of a flat or horizontal surface surrounding the convex surface 6, there is arranged an oppositely inclined surface it whichis adapted'to compress the edge of the flap so as to reduce its thickness as shown at in Fig. 3.

Moreover a channel is may be formed around the punch 0, as shown in Fig. 1, into which the paper compressed between the surfaces Z) and 6 can flow, this extruded paper forming a feather edge to the aperture In the device shown in Figs. 41 and 5, the punch. m is shaped to form a narrow slit n (Fig. 6) extending nearly to the edge of the flap, this slit being surrounded by a por tion of reduced thickness 0 formed by an inclined surface 6 aroundv the punch m.

The edge of the flap is also provided with notches 79, 79 formed by punches 9, 9; it is moreover reduced in thickness, as shown at r, by means of inclined surfaces h.

I claim: 7

1. The combination, with a series of punches having around them convex surfaces, said punches also having an oppositely inclined surface extending around and outside of said convex surfaces, of a die for coacting wlth sa1d punches and with said inclined surfaces, for the purpose specified.

2. An apparatus for shaping the flaps of envelops, postal Wrappers and the like, such apparatus comprising a series of punches for cutting material from the stock and having a series of oppositely inclined shaping surfaces, and a flat surface arranged be-' tween said inclined shaping surfaces, in combination With a die comprising apertures for coacting With said punches and surfaces for coacting With said inclined shaping surfaces. V r

3. An apparatus for use in the manufac ture of envelops, postal Wrappers and the like, said apparatus comprising a punch for cutting material from the stock and having an inclined surface adjacent to said punch and a channel between said punch and said inclined surface, and'a die for coacting With said punch and With said inclined surface, for the purpose specified.

4. An apparatus for use in the manufacture of envelops, postal Wrappers and the like, said apparatus comprising a punch for cutting material from the stock, and having an inclined surface adjacent to said punch and a. channel between said punchand said inclined surface, an oppositely inclined surface extending outside the punches, and a die for coacting with said punches and with said inclined surfaces.

HY BROWN.

Witnesses:

HERBERT A. BEESTON, CONRAD K. FALKENSTEIN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

